Journal-bearing for electric machines.



C. L. DAUN.

JOURNAL BEARING FOR ELECTRIC MACHINES. APPLICATION man ocT. 14. 1915.

1,176,037. V Patented Mar.21,1916.

INVENTOR ATTORNEY THE COLUMBIA PLANOGRAPH 0., WASHINGTON. D. c.

CARL L. DAUN, or SAGINAW, M'ICH'GA.

JOURNAL-BEARING FOR ELECTRIC MACHINES.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed Cctober 14, 1915. Serial No. 55,805.

Tov all whom 'it may concern: vBe it known that I, CARL L. DAUN, a citizen of theUnited States, residing at Saginaw, in the county of Saginaw and State of- This invention relates to journal bearingsV and pertains more particularly to journal bearings usedin certain classes of machines in which it is essential that means be provided for accurately maintaining the central position of the shaft carried by the bearing, and to provide means lfor easily and quickly restoring the shaft to its correct central po- 2o sition when the shaft'has been allowed to depart from that position by even very small amounts of'wear in the bearing.` An

` example of a class of machines in which such exa'ctness of alinement of the shaft is regenerators andv similar electric machines,

" employing an inner revolving memberl and outer stationary member, the clearance between the two members being very small, and being known asV the' air-gap It is essential that 'this thin air-gap shall be maintained of a uniformr thickness throughout the 'circumference of the rotating member, "so as to leave a truev yannular spaced of VAt? even thickness between the revolving and' thestationary members, If, by reason of wear, the axis of the inner member'is per-Y inittedV to drop, even a veryl slight'amount,

"the thickness of the air-gap becomes greater at Yone place thanit` is at another, resulting in decreased efficiency of `the electric machine. The importancel ofmaintaining extreme accuracy of alinement of the shaft axis Vwillbe appreciated when: itis noted that the usual airegap is about one-sixty- A' fourthof an inch in thickness and ya distoi-tion of'thisgap due to wear' of the shaft bearings, `equalr to one-half that amount,

causes? a large percentage of drop in elec-.

trical efficiency of the motor, and because of thefresulting increased magnetic pull, the

"wear of the bearing rapidly increases.

It is the purpose, therefore, of my present invention to provide a bearingV construction vthat is simple in design, consisting of but @fw parte .and :vet capable: Qffeasly. .and

quired to be maintained is electric motors,-

rig. 1.

quickly restoring the axis of the shaft to its central position after the bearing has" become worn, even though the amount of wear is very small, and to expose at each adjustl'nent a new bearing surface to take the weight of the shaft and its load.

A further purpose is to so construct the bearing that the shaft alinement can be accurately and properly made by an unskilled person.

With these and other objects in view, which will appear later in the specification, my invention comprises the devices described and claimed, and the equivalents thereof. v

In the drawings, Figure l'is a vertical transverse section through a bearing embodying my improvement. Fig. 2 is a transverse section on the line 2-2 of Fig. 1. Fig. 3 is an end view of the bushing with theoil ring in place. Fig. 4 is a perspective view vof the bearing sleeve, and the two bushings to be received within it.

As is clearly shown in the drawings, the device consists in the usual machine or motor frame 1, carrying the housing 2, in which the bearingis mounted. The bearing, which'is preferably of the ring-oiling type, is constructed as follows; A cvlindrically bored sleeve 3 ismounted in the housing,

V being preferably held in place by a pin 4:-

passing through the housing and through the sleeve 3. The housing is formed ywith the usual oil chamber 5, which surrounds the middle part of the sleeve 3, as shown in The upper partof the sleeve isformed with a transverse slot 6, as lshown in Figs. 2 and 4. The inner end of the sleeve 3, thatis. the end nearest the revolving member of thev machine. is provided with a flanged'bushing 7 of brass. or other suit able metal. One face of its flange bears against the inner end of the sleeve 3, and also against a shoulder of the housing 2, ras shown in Fig. 1, to take any end thrust of the rotating member of the machine. 'Thel bushing 7 extends into the sleeve to the edge of the slot 6, and similarly a second bushing 8 is inserted in the sleeve from its outer end, and extends to the edge of the slot 6.

This outer bushing is formed with an annu Vlar ange 9. The inner bushing 7 is preferably pressed into the `sleeve 3 with suf-V ficient pressure to cause it to frictionally engage the bushing toV preventturning of thefleeve when theahailQ-is' ruiming with f more of these openingsvll, as shovvn in Fig. 1, to permit thebushing to be turned to and the sleeve with a snug` fit and is preferably formed with a hole 11 to receive the inner end of the pin 1, by which the 'bushing 8 isl normally held in place in the sleeve. The bushing-8 is preferably formed with two or secured in various adjusted positions, for the purpcsespresently to be described.- .An

oiling ring 12 is loosely received in the slot 6 and rests on the upper periphery of the shaft 10, the' lower part of the ring dipping into the'oil of the chamber 5 to lubricate the shaft in the usual manner. Between the ends of the bushings 7 and 8 there is an an-` nular cup-like space 13 completely inclosed by the sleeve 3, except for the opening provided by slot 6. The -space 13, which extends around approximately two-thirds fof the circumference of the shaft'fills vvith oilV and Will'remain full so long as the ring -12 `properly'performs its'function of drawing up oil from chamber and depositing it on the shaft, but in case chamber 5 is allowed toA run dry', the annular space 13, contains sufficientoil to keep the shaft lubricated for 5 ay considerablelength of time, thus serving as a means oflubricating in emergency.

Another advantage ofthe cup is lthat during coldiveathenthe oil in chamber 5 mayF become chilled :and stiff 1nd `when' the motorl Y' .starts undersucliconditions the "ring doesv not begin Vtooturn until the oil iswarmed.

d *Thi'scun 6 contains sufiicient oil to lubricate the bearing until the ring begins to operate.

i Y.Whenthe bushings 7 and Siliave'become :slightly Worn, `so as Ato allow the kaxis of :shaft 1 to depart from itsY true position,

even by'a very small amount, it isY merely necessary to removethe pin 4 and rotate the outer bushing -8 a half turn, in order toirestore the shaft -l0 to its proper alinement,

` after ivhich'pin 4is replacedin one ofthe Y Aopenings 11' of the bushing, Toper'mit' bushing V8 to be'easi'ly turnedvvithout lre- Vmoving the shaft, or lany other parts of the machine, I: providepockets, Vor recesses,'14

lin the outer face of itsfiange 9,'to receive the end of a punch, or other tool by Which the bushing 9 may be rotated a halfturn of' fthe sleeve3, as above described. Toremove the oil from the ends of the bearing, Iprodivide oil grooves 15 in the bushing and pro-k vide openings 16 through'vvhich the oil may drop into the housing, as indicatedin Fig. 1.

By the means above described', Ihave produced a simple, relativelyinexpensive, and

1 efiicient device for lubrication of, motor and f l `other bearings and have' embodiedy in it means whereby; the minute adjustment required in this class of bearings may be effected, Without the use of screws, or similar adjusting means. It Will further be noted that after Wear of the bearing has occurred and the shaft alineine'nt has been restored by rotating the outer bushing in, the manner described, there will be no tendency for'the shaft to chatterfas would be the case if both of the bushings Were rotated,'or if the bushings were; formed" ii'itegr'alY instead of independent, as herein described. Havingthus described' my invention, What I claim and desire to secure by Letters Patentis: l l. Thecombination of a shaft, a housing, a cylindrically bored sleeve carriedvby .said

housing, a bushing inserted in thevinner end V housing, a bushing inserted intheV inner v Vend of said sleeve and extending part Way therethrough, saidV bushing held in'placey by frictional Vengagement with said sleeve', a second bushing rotatably inserted inthe outer end of said sleeve and extendingpart way therethrough, a iange .on said bushing,

said flangev formed with tool-receiving opens s ings, and fastening meansadapted tosecure said second bushing in various circumferenti'all-y adjustedjpositions, for the-purposesV lsetforth. V,i 3. In a shaft-bearing, the combination of; Y Y

a fsuitablyf supported cylindrically bored y sleeve.v a bushing inserted-in the inner endV of said sleeveV and extending part Svay therethrough, said bushing releasably A.held

a second bushing rotatablyinserted in the 'in frictional engagementvvvith said sleeve'r inner end `of said .sleeve and extending: part way therethrough, Va angebn said second bushing, said flange formed with'tool-receivng openings, y, and fastening meansadapted to secure -saidsecond bushing 1n various circumferentially adjustedY positions.V c Y l 4.. The

disposed sloty in its upper part. a bushing inserted inthe inner end of said sleeve and of said f sleeve .and extending part Way therethrough,` the I adjacent ends of Ysaid' bushingsspacedjapart to formga cup becombination of a shaft, :a housing formed with an oil chamber, av cvlndrically v bored sleeve extending across said' oil chamber and formed With a `Vcircumferentially 12o f Y tween them, fastening means eadaptedf to: c

secure-said' secondlbushing in 4various circumferentially adjusted positions, an oilcarrying ring loosely received in the slot of said sleeve and resting on said shaft, the lower part of said ring extending into said oil chamber.

5. The combination of a shaft, a housing formed with an oil chamberya cylindricallybored sleeve carried by said housing and projecting` across saidchamber, said sleeve formed with a transverse slot, a bushing inserted in the inner end of said sleeve and having one end substantially in register with one edge of said slot, an outer bushing inserted in the 4outer end of said sleeve, one end of said bushing being substantially in register with the outer edge of said slot, said outer bushing adapted to be rotated in said sleeve, to restore the alinement of the shaft and present a new bearing surface for said shaft, and means for securing said sleeve in its adusted position, together with an oiling ring received in the slot of said sleeve, for the purposes set forth.

In testimony whereof, I aiix my signa,- ture in presence of two witnesses.

CARL L. DAUN.

Witnesses: V

NELLIE M. ANGUS, ROY WALLIS.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

